<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // document.onkeyup = function() {
        //     console.log('我弹起了');
        // }
        document.addEventListener('keyup', function() {
            console.log('我弹起了');
        })

        document.addEventListener('keydown', function() {
                console.log('我按下了');
            })
            //keypress 不能识别功能键 比如ctrl shift 左右箭头 F12
        document.addEventListener('keypress', function() {
                console.log('我按下了press');
            })
            //先执行keydown 再执行keypress
    </script>
</body>

</html>